If I got drunk, wandered in to your house and took a nap on your sofa, would that be a property rights violation IYO? I really don't think I should have to explain why this type of thing is "a violent act", or that if you argue this point anyone should take anything you say seriously.
You are begging the question that people have rights to property. So let's rephrase: If you got drunk, wandered into my house, took a nap on my sofa, woke up, and left, and I never knew, would that be a violent act? IMO no it would not be as no one was harmed and no one was fouled. You got a good night sleep and I didn't care.
The problem with anarcho-capitalism is that it expects people to accept a mythical contract of ownership, but I never ratified that contract of ownership. If you are mining gold from a mine what is it, morally, that gives you exclusive right to that land. Anarcho-capitalism handwaves when it says property rights, but it never answers how people got those rights in the first place. All property that is owned has some aspect of violence attached to it, and in fact the defense of property requires at it's base violence.
Personally, I take another approach to ownership, and actually bitcoins themselves fit in with this philosophy. However, this topic has strayed too much, I think.